[Richard Coutts-Smith]

Hi Phil,
Yep, going down that path too, after all the welds the faces are out, although the manifolds look quiter true. Although after seeing the size of the ports in the "Y" and the head manifold I think some fine tuning of the pipework will give a major benefit.
Does yours have a heat shield fitted over the manifold, below the distributor? Noticed today that my spare engine has a casting threaded for the shield, while the original engine has neither the shield or the casting?
Rich.